OEM Equipment
Electrical Apparatus
800-75
300 A Externally Operated Series
Multiple (Dual Voltage) Switch
GENERAL
The Cooper Power Systems 300 A
externally operated series multiple
switch is used to change connection
of de-energized transformer windings
between series and parallel to provide
dif­fer­ent common transformer voltage
ratios.They also make it possible to
stock one transformer with voltage
conversion capability. The switches
may be used for 3:1 or lower voltage
ratios only. Ratios other than 2:1 or 3:1
may require a backplate.Tri-voltage
switches are also available.
Externally operable switches eliminate
many of the hazards associated
with manual internal tap changing
of distribution transformers because
line crews need not be exposed
to high-voltage conductors and
hot transformer fluid. They also
eliminate the need to dismount
pole-type transformers for voltage
ad­just­ment and prevent exposure
of the transformer tank interiors to
contamination. The switches are
designed for use in distribution
transformers filled with transformer oil,
Envirotemp FR3 Fluid or an approved
equivalent.
Series multiple switches have padlockable, hotstick-operable handles,
which provide greater leverage and
positive indication of switch position.
The switch shaft is made from high
strength steel and is sealed against
leakage by two high temperature
resistant Viton® O-Rings. The switch
body and rotor are made of a glassreinforced polyester. The spring
tempered high conductivity copper
pinch-type rotor contacts provide
dependable self-cleaning action.
Figure 1.
300 A Externally Operated Series Multiple (Dual Voltage) Switch.
TABLE 1
Voltage Ratings and Characteristics
TABLE 2
Current Ratings and Characteristics
Description
kV
Description
Amperes
Standard Voltage Class
35 Max.
Continuous
ac 60 Hz 1 Minute Withstand
50
300 A rms series position
600 A rms parallel position
BIL and Full Wave Crest
150
(in both series and parralel positions)
Voltage ratings and characteristics are in
accordance with IEEE Std C57.12™ standard.
(Phase-to-Phase or Phase-to-Ground).
INSTALLATION
No special tools are required. The
switch body is installed through
a keyed 1.33 inch (34 mm) hole
in the tank wall and sealed by an
inside gasket. An outer sealing nut
is tightened to a torque of 80 to 120
in.-lb. Refer to Installation Instruction
Sheet S800-75-1 (5000050064) for
details.
July 2008 • Supersedes 01/90
1
300 A Externally Operated Series Multiple (Dual Voltage) Switch
SCREW
LOCK WASHER
HANDLE
NUT
INDEX
PLATE
TANK WALL
GASKET
SWITCH
3.9”
(98 mm)
7.25”
(184 mm)
6.0”
(152 mm)
Figure 2.
One-Phase Switch with 3” Handle.
NOTE: Dimensions given are for reference only.
2
800-75
SCREW
HANDLE
NUT
Figure 4.
Mounting Hole.
INDEX
PLATE
TANK WALL
GASKET
SWITCH
9.7”
(246 mm)
7.25”
(184 mm)
FIBRE BACK
PLATE REMOVED
FOR CLARITY
6.0”
(152 mm)
Figure 3.
Three-Phase Switch with 5” Handle.
NOTE: Dimensions given are for reference only.
3
300 A Externally Operated Series Multiple (Dual Voltage) Switch
ordering information
To order a Cooper Power Systems
300 A series multiple switch, specify
catalog numbers for one switch and
one hardware kit in Tables 3 and 4.
TABLE 3
Dual Voltage Switches
Contact Type
Catalog Number
One-Phase Dual Voltage with 6 Terminals
2201977B01M
One-Phase Dual Voltage with 8 Terminals
2201977B23M
Two-Phase Dual Voltage with 6 Terminals on each deck
2201977B17M
Three-Phase Dual Voltage with 6 Terminals on each deck
2201977B02M
Three-Phase Dual Voltage with 8 Terminals on each deck
2201977B05M
One-Phase Dual Voltage with 4 Terminal Back Switch
2201977B04M
NOTE: A Hardware Kit must be ordered with each Switch.
TABLE 4
Hardware Kits
Description
Single-Phase , 3 inch Lever Handle
Catalog Number
2237947A21
Single, Two, and Three-Phase, 5 inch Lever Handle
2237947A23
Single, Two, and Three-Phase, 5 inch Hotstick Operable Lever Handle
2237947A330
Padlocable Single-Phase, 3 inch Hotstick Operable Lever Handle
2237947A331
Padlockable Single-Phase, 3 inch Lever Handle
2237947A336
Hotstick Adapter Kit for Lever Handle Hardware Kit
2237913B01M
* All 5 inch Lever Handles are padlockable.
© 2008 Cooper US, Inc., or its affiliates.
Envirotemp and FR3 are valuable trademarks of Cooper US, Inc. in the U.S. and other
countries. You are not permitted to use the Cooper Trademarks without the prior
written consent of Cooper US, Inc.
Viton® is a registered trademark of DuPont Performance Elastomers.
IEEE Std C57.12™ standard is a trademark of the Institute of Electrical and Electronics
Engineers, Inc., (IEEE). This publication/product is not endorsed or approved by the
IEEE.
4
2300 Badger Drive
Waukesha, WI 53188 USA
www.cooperpower.com